Electric switch.



R. O. W. LUNDIN.

ELECTRIC SWITCH.

APPLlcATIoN FILED 050.115,1915.

1,2249 3L l 6, C Patented Apr. 24, 1917 III ' objects I employ a swinging contact making i or connncrrcn'tr.

To all rwhom t may concern.'

Be it known that RAGNAR 0. W. LUNDIN, a citizen of the United States of "America, residing at New Britain, Connecticut, have invented a new and useful Electric Switch, of which the following is a specification.

This invention relates particularly towall or Hush type switches and the general objects of the invention are to provide a positive, quick acting switch of simple and inexpensive construction, consisting of but few parts and of .compact design.

special object is to so construct the switch that a comparatively slight move- `ment of an actuating member will be suiicient to effectV the actuation of the switch.

lin the achievement of the above and other lever and operate the same by means of a rocking lever which is pivoted at a point to one side of the point of pivotal support of the swinging contact making lever and which has a spring supporting portion dis-- posed substantially in the plane of pivotal support of the contact making lever, with a switch throwing spring connected between this off-set spring supporting portion of the rocking operating lever and the free end of the contact making lever.

The switch operating lever is preferably actuated by means of push buttons connected to the ends thereof, a special feature of.

the invention residing in the manner of securing the push button to the operating ever.

Another feature of the invention is a formof arched support for the switch operating and contact making levers and a simple and eEective method of mounting these levers on said support.

Various other features and details of construction will appear as the' specification proceeds and will further be made clear by consideration of the accompanying drawing which illustrates the invention embodied in a practical and preferred form.

In this drawing ,i Figure 1, is a plan view of a wall switch having the invention incorporated therein,l the cover and supporting yoke being omitted` for the sake of clearness.

Fig. 2, is a detached detail view of the actuating parts of the switch and the mounting therefor.

Fig. 3, is a longitudinal sectional view of Specification of Letters Patent.

.are earn nnte.'

0. W. LUNDIN, OF NEW BRITAIN, CONNECTICUT, ASSTGNR T0 THE TRUNK- BULL MN'UFACTUBING CMP-NY, 0F PLAINVILLE, CONNECTICUT, A CORPORATION ELECTRIC SWITCH.

ran-)atea npr., sa, reir.

Application iledDecember 16, 1915. Serial No. 67,121.

the switch taken substantially on the plane of the line 3-3 of Fig. l. Fig. 4f, is a transverse sectional view taken substantially on the plane of the line lr-4 of rig. 1.

, Fig. 5, is a view of the switch parts in separated relation.

rlhe switch .mechanism is supported on a suitable insulating base 7, which, as illustrated, may be hollow, in the form of a box, and adapted to be supported in proper'position in a ywall or elsewhere by means of a bridge piece or supporting yoke 8 extending across the open front side of the box and secured thereto by screws 9.

The movable members of the switch comprgse only two main parts, a contact making lever 10 and a switch operating lever 11` and thesemovable parts are preferably both supported in a single supporting bracket 12.

fn the form of the invention illustrated the contact making lever is in the form of a substantiallyv U-shaped member having substantially parallel side arms 15 joined ytogether at their lower ends and provided at their upper`ends with .laterally extending pintles 16.

The supporting bracket'is shown arched in its intermediate portion, providing the upright sides 18 connected by the top 19, base or foot portions 2O being provided at the opposite ends of the bracket to receive screws 21 or other suitable fastenings Vpassed up through the base.

Socket 22 forrthe contact making lever pintles are provided in the upstandin'g side portions of the arched bracket and these sockets are preferably elongated in the form of slots, the opposite end portions 23 of which provide bearings for the rocking switch operating lever. These bearing slots,

"are preferably left open at one side as indicated at 24e` to facilitate assemblage of the parts.

simply forming separated openings 25 and 34 in the respective members connected b, a narrow bridge portion as indicated which forms the spring seat proper and these bridge portions may be struck up out of the plane of the metal of which they are a part,

I as indicated in the several views so that y the hooks can be more readily engaged therewith. By reason of this construction the hooks on the springs, stand, when the parts are assembled, in planes parallel to the pivotal planes of the two levers. Consequently there is no liabilityy for the springs'to become unhooked or displaced and in the swinging movement of the two levers the spring hooks simply pivot easily on the bridge pieces or@ spring seats with which they are engaged.

The push buttons, constituting the handles or means for operating the switch illustrated, have relatively lat Shanks 35 formed with openings 36 adjacent the lower ends thereof and with notches 37 in their lower edges. The oppositely extending arms of the switch operating lever are formed with openings 38 adjacent the ends thereof and with entrance slots 39 opening into said openings. It will be evident from this construction that the pushl but tons can be operatively engaged with the switch operating'lever by simply entering the notched end portion of the shank through the slot 39 into the pivot opening 38 in the switch operating lever as indi cated at the left in Fig. 5 and turning the button up into the upright position as shown at the ri'ght end of this lever in said figure. A reversal of this operation obviously will permit detachment of the operating push buttons.rom theswitch operating lever.

In the particular embodiment illustrated the contact making lever in its active osition engages between and bridges a pair of conta'cts 40 and in its other extreme position is out of engagement with' all contacts, the throw or extent of movement of the contact making lever being limited by the inturned stops 41 provided at the lower end of the arched supporting bracket.

stood by reference to Fig. 3 wherein it will be f seen that when the left hand push button 29 is The operation will perhaps be best under.-

seat 25 with which the upper end 32 of the throwing spring is engaged from the position at .the righthand side of the :contact making lever pivot over to a position lin` line with said pivot and thence on toward the left past said pivotal point, the spring acting as the spring support swings on past the said center, to snap the contact making lever toward the left with a quick movement. The spring now exerts its tension to hold the contact making lever in the position to which it has thus been shifted, said lever therefore remaining in the position in which it has been shifted until the opposite push .button is operated.

The arching of the switch operating leverl and the engagement of the spring with the arched portion of this lever enables a relatively slight movement of said lever to eiiect the operation of the switch, and it will be seen too, that this construction provides an extremely compact arrangement.

. The rocking movement of the switch operating lever is limited, in the construction illustrated, by the engagement of said lever with the under side ofthe top 19 of the arched supporting bracket as indicated in Fig. 3 and the swinging movement ofthe contact making lever past the pivot of the operating lever is provided for by off-setting or looping the contact making lever as indicated at 45 around the switch operating pintles.

The open-sided bearing slots permit ready engagement of the pintles on the two leversv 1. In a switch of the character described, a

swinging contact making lever, a relatively stationary contact arranged to be engaged thereby, a rocking switch`operating lever pivotally supported below the point of pivotal support of the contact making lever and provided with a spring seat substantially in the lplane of the pivotal support of the contact making lever, a tension spring stretched between the contact making lever and the switch operating lever connected to said spring seat at one end and connected with the contact making lever at its opposite end and means for rocking said switch operating lever to thereby carry that end of the spring which is engaged with the spring seat to one side of tlghe pivotal center of the contact making ever.

l2. In a switch of the character described, a swinging contact making lever, a relatively stationary contact arranged to be engaged thereby, a rocking switch operating 13o lever pivotally supported below the point of pivotal support of the contact making 'lever and provided with a spring supporting portion arched .upwardly towardthe pivotal support of the contact making lever, a spring engaged with said arched portion at one end and with the contact making lever at its opposite end,v and means for rocking the switch operating lever.

3. In a switch of the character described, a supporting bracket having aslot therein, said slot being open at one side intermediate the ends of the same to admit pivots forengagement in the opposite ends of the slot, a contact making lever having a pivotal engagement in one end of said slot, a switch operating'lever having a 'pivotal engagement in the opposite endof said slot and arched toward the contact making lever pivot and a throwing vspring connected between the contact making lever and the arched portion of the switch operating lever and exerting tension to hold the pivots of said levers at 'the opposite ends of said open pivot slot.

RAGN 0. W. LUNDIN. 

